# Calculating a mortgage loan with monthly compound interest
# By C. Calongne, 01/14/2019
# Pseudocode & Python with Strings, M3Lab2_student.py
# Write the statements requested in Steps 1-7 below
#
# See the examples in the provided code
# Use structured programming and indent your code.
# Programmer Name: *****add your name here****

print()
print("Welcome to the Mortgage Loan Calculator.")
print("****************************************")

# ****Instructions****
# Complete Steps 1-7 in the comments below. The remaining comments explain the logic.
# Customers can check a variety of loans and interest rates. When finished, type quit

# Step 1: add an input statement to enter name or type quit to exit
name = input("Enter a name: ")
while name != "quit" :
        
    if name == "Quit" or name == "quit":
        break
        
    # Step 2: add a while loop to keep asking for a name until the user types quit
    
    # Step 3: declare two variables for loan and interest, like months below,
    # convert them to float, and ask the user to input their values to the screen
    
    
    loan = float(input("Enter the total amount of loan: "))
    interest = float(input("Enter the interest: "))
    months = float(input("How many months will it take to repay your loan? "))
    print("***************************************************************")
    print (name, "you requested an estimate on a loan for {0:.2f}" .format(loan))
    
    # Step 4: add a print statement to display the interest and # of months
    print("interest = " + str(interest))
    print("number of months = " + str(months))
      
    print("*******************************************************************************")
    print("Here are the rates for simple interest, compound interest, and monthly interest", "\n")
    
    # calculate the rate for one month's interest + payment by adding 1 to a month's interest
    interest_rate = float((interest/12)+1)
    
    # calculate the compound interest per payment period by raising the
    # monthly payment to the negative power of total months
    compound_interest = float(1-((interest/12)+1) ** -months)
    
    
    # Step 5: print the interest_rate and compound_interest to the display screen
    print("interest_rate = " + str(interest_rate))
    print("compound_interest is= " + str(compound_interest))
    # calculate the monthly interest based on the compound interest
    monthly_interest = float((interest/12)/ compound_interest)
    print(monthly_interest, "\n")
    
    # calculate the monthly loan payment with monthly compound interest
    payments = float(loan * monthly_interest)
    
    
    # Step 6: write a print statement that displays the monthly payments to two decimal points
    print (name, "your monthly loan payment is  {0:.2f}" .format(payments))
    # Tip: use the 0:.2f format from an earlier example, only for the payments
    
      
    
    print("*******************************************")
    # Step 7: add an input statement to enter name or type quit to exit
    name = input("Enter a name: ")


print()
print("Thank you for using the Mortgage Loan Calculator")